Powertrain, generic (extended)

P2061 Reductant Injection Air Pump Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2061 is the high-side counterpart: the pump or valve output that feeds atomizing air carries voltage when the controller expects it to be off, or the diagnostic sees a level that only a connection to battery positive can explain. Deutz documents it on the EMR L1 controller as P2061-00, short circuit to battery on the high side (SPN 5796). The consequence can be the reverse of P2060: the valve may stay energised and keep blowing air through the dosing unit even when no DEF is wanted, which wastes compressed air, while the controller still blocks dosing because it has lost control of the output. Typical are a wire pinched against a powered cable in the same loom or a damaged connector. Open circuits belong to P2059.

Likely causes

Control wire shorted to a powered cable in the loom
Damaged connector with bridged pins
Output stage in the controller failed

Symptoms

  • Emission warning lamp on
  • Air valve may run continuously, air system loses pressure
  • DEF dosing blocked

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

reductant air pump

Related codes

P2059P2060

References: serdia.deutz.com, law.cornell.edu, energy.gov.